Box populi

Mumbai: Mumbai Metro trains will have something their counterparts in Delhi and Kolkata don't: a black box. Similar to the black box on airplanes, these crash-proof data recorders will be fitted in each of the four coaches of the trains. The trains will also be equipped with CCTV

Mumbai: Mumbai Metro trains will have something their counterparts in Delhi and Kolkata don't: a black box. Similar to the black box on airplanes, these crash-proof data recorders will be fitted in each of the four coaches of the trains. The trains will also be equipped with CCTVs and a passenger-driver communication system.